Focus on Cellulose ethers

ʻIke ʻike loea Hydroxypropyl Methylcellulose

ʻIke ʻike loea Hydroxypropyl Methylcellulose

Eia ka papaʻaina e hōʻike ana i kekahi ʻikepili ʻenehana maʻamau no ka hydroxypropyl methylcellulose (HPMC):

Waiwai Waiwai
ʻO ke kinona ʻO ka cellulose derivative
ʻAno molekala (C6H7O2(OH)xm(OCH3)yn(OCH2CH3)z)n
Laulā kaumaha molekala 10,000 – 1,500,000 g/mol
Ka nana aku Keʻokeʻo i ka pauka keʻokeʻo
Ka hoʻoheheʻe Hiki ke hoʻoheheʻe ʻia i ka wai, ʻaʻole hiki ke hoʻoheheʻe ʻia i nā mea hoʻoheheʻe organik
Laulā viscosity 5 – 100,000 mPa·s (e pili ana i ka pae viscosity a me ka noʻonoʻo ʻana)
Palena wela gelation 50 – 90°C (e pili ana i ka pae viscosity a me ka hoʻopaʻa ʻana)
pae pH 4.0 – 8.0 (1% hoʻonā)
ʻoluʻolu ≤ 5.0%
ʻAno lehu ≤ 1.5%
Nā metala kaumaha ≤ 20 ppm
Nā palena microbial ≤ 1,000 cfu/g no ka heluna microbial aerobic; ≤ 100 cfu/g no ka huina pau o na hu a me na poni
Nā mea hoʻoheheʻe koena Kūlike me USP 467
Ka hāʻawi ʻana i ka nui o nā ʻāpana Aia ka 90% o nā ʻāpana i loko o 80 – 250 µm
Ola ola 2-3 mau makahiki ke mālama ʻia ma kahi maloʻo a maloʻo

He mea nui e hoʻomaopopo he ʻokoʻa paha kēia ʻikepili ʻenehana ma muli o ka pae kikoʻī a me ka mea hana o HPMC. Manaʻo mau ʻia e nīnau i nā kikoʻī huahana i hāʻawi ʻia e ka mea hana no ka huahana kikoʻī āu e hoʻohana nei.


Ka manawa hoʻouna: Mar-04-2023
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